It is considered that driving becomes impossible when the driver has more than three milligrams of alcohol per liter of blood. Three beers and three whiskies are the quantities to get there.
Apart from receiving a ticket and taking away their driver's license, according the misdemeanors Law no. 19.120, driving vehicles with more than 1,2 grams per liter in blood is considered a fault, and such person should be taken to court to be judged and pay with community service, or perhaps end up behind the bars.
Three of Every 10 Drunk Drivers Were Almost in a Coma Behind The Wheel
In six months, the Montevideo Municipality sent 314 people to the Misdemeanors Court for alcohol abuse